Sidewalk-elevator.



N0.724,205. PATBNTED 154,511.31. 1903.

' J. RIEG.

SIDEWALK BLEVATOR.

APPLICATION FILED AUG. 2B, 1902.

N0 MODEL. 2 SHEETS-SHBEIT 1.

wl" x lItllllllllllllIIIIIIIIIIIIIIII lll N0. 724,205. PATENTED MAR. l, 1903. l J. RIBG. SIDBWALK ELBVATOR.

PPLIOATION FILED AUG. 26- 1902.

No MODEL.y 2 SHEETS-SHEET z..

l 982mm@ www/ s@ NITED STATES PATENT OFFICE.

JACOB RIEG, OF WILKSBARRE, PENNSYLVANIA.

SIDEWALK-ELEVATO R.

sPnciFIcAcrroN forming par'. of Letters Patent No. 724,205, ldated Maren 31, 1903.

Application filed August 26,1902. Serial No. 121.084. (No model.)

To all whom it may concern:

Be it known that I, JACOB RIEG,'a citizen of the United States, residing at Wilkesbarre, in the county of Luzerne, State of Pennsylvania, have invented certain new and useful Improvements in Sidewalk-Elevators, of which the following is a specification.

This invention comprises certain improvements in' sidewalk-elevators of the kind illustrated in my Patent No. 663,786.

The details of the present improvements will be pointed out in the following specification, taken in connection with the accompanying drawings, in which- Figure 1 is a front view of the elevator, the upper portions of the guideways only being shown. Fig. 2 is a side View of the same. Fig. 3 is a rear view of the same; Fig. 4 is an enlarged side view showing the platform and upper portion of the ways, the side of the platform being partly broken away and one of the guide-plates for the bolt carrying the roller-bearing being removed. Fig. 5 is a similar view showing the lower part of the platform with the rollerbearing removed from contact with the guideway. Fig. 6 is a section on the line 6 6 of Fig. 5, both guideplates being shown in position. Fig. 7 is a perspective view of one of the rianged guidepieces for guiding the platform.

Referring to the drawings, 1 and 2 indicate a pair of parallel guideways which may be suitably connected together and upon which is arranged a platform 3. A rope 4 is provided for the purpose of raising and lowering the platform. One endl of this rope is detachably connected to the platform by means of a suitable hook 6, and the opposite end of the rope is secured to a pulley-frame 7, suitably supported between the guidew'ays The rope extends from the stationary pulley-frame 7 around a series of friction-rollers 8, arranged in a zigzag manner in a pulley-frame9 upon the back 10 of the platform, and from thence passes around a series of pulleys 11 in the stationary pulley-frame 7, thence through an eye 12 upon a lever 13, and its free end is connected by the hook 6 to the platform. The purpose of the friction-pulleys is to enable the operator to lower heavy loads easily. These pulleys, however, add friction to the movement of the slide in both directions, and

hence considerable power is necessary to raise the platform by pulling on the part 4b of the rope, especially if the platform carries a load. In order to raise the platform readily, the part 4:L of the rope is connected directly, by means of the hook 6, to the platform, so that by pulling upon the part 4 of the rope the platform may be raised with a minimum amount of friction, and the slack in the part 4l of the rope may be taken up after the platform is raised.

In order to lock and hold the platform iu its raised position, alug 14 is arranged upon the back of the platform, which lug is engaged by a catch 16 upon the lower end of the lever 13 by simply moving the part 4b of the rope to the left (in Fig. 3) after the platform is in its highest position. 'lhis arrangement for supporting the platform in its highest position is shown in my patent already referred to. In the present invention I have arranged a springlatch 17 on the pulleyframe 7, which when the lever 13'is moved to engage the lug hooks under a catch 18 at the upper end of the lever and holds the lever with the catch 16 in engagement with the lug ways and serve to guide the lower end of the platform. The upper portion of the platform is guided by means of guide-pieces 20, (shown in detail in Fig. 7,) each guide-piece comprising a part 21, having at one endan opening 22, th rough-which a pivot-pin 23 extends into the face of the back piece 10 of the platform. A ange 24 extends downwardly from the forward end of the part 2l and at the lower end of said flange is arranged a roller 25, which extends beneath the guideway. `At the inner side of the part 2l is arranged an upwardlyprojecting rib 26. These anged guide-pieces are pivoted in the manner shown near the opposite sides of the back piece 10, and when in their normal positions the inner edges of said guide-pieces rest against the brackets 27 of the platform. The guide-pieces are locked in their normal positions by means of catches or buttons 28, pivotally secured to the brackets andadapted to extend in front of the ribs 26. When it isdesired to remove the platform from the skids or guideways, it is merely IOO necessary to disengage the catches 28 from the ribs 26, and the flanged guide-pieces may be then swung outwardly, as shown in dotted lines iu Fig. l, until the rollers 25 are moved from beneath the guideways.

It is desirable at times to lessen the friction of the platform upon the guideways-as, for instance, where the elevator is not steeply inclined or where the loads are light and the friction is not desirable for the purpose of retarding the descent of the load and also in cases where the material is being raised instead of being lowered. For this purpose I have arranged within a recess in each bracket of the platform a bolt 29, movable between guide-plates 30, which latter are secured to the brackets and inclose the recess laterally. The guide-plates are provided with parallel ribs 3l, arranged at an acute angle to the back of the platform, these ribs serving as guides for the bolts 29. A rectangular recess 32 is formed in the rear end of the bolt, and

within said recess is a cam or key 33 upon a shaft 3l, pivotally mounted in the plates 30 and having a squared end 35, to which may be attached a wrench 3G. The lower end of the bolt 29 is forked, and between the forked ends of the bolt is pivoted a roller 37.. By turning the wrench 36 in one direction the bolt carrying the roller will be moved into its retracted position, (shown in Fig. 5,) in which position the bolt is locked against accidental displacement by the key When the key 33 is given a semirevolution, however, the bolt is forced downwardly and the roller 37 rests against the adjacent guidcway, in which position it is locked by the key 33, as shown in Fig. Il. The platform is thus raised out of engagement with the guideways, except at its upper end, as plainly illustrated in Fig. 4. The rollers thus form bearings for the platform and lessen the friction ot' the platform upon the guideways,

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a sidewalk-elevator, the combination with a pair of parallel guideways, of a platform adapted to slide on said guideways, and rollers upon said platform movable out of and into engagement with the guideways and adapted to form bearings for the platform when in engagement with the guideways.

2. In a sidewalk-elevator, the combination with a pair of parallel guideways, of a platform adapted to slide on said guideways, rollers upon said platform movable out of and into engagement with the guideways and adapted to form bearings for the platform when in engagement with the guideways, and means for locking said rollers in dierent positions.

3. In a sidewalk-elevator the combination with a pair of parallel guideways, of a platform adapted to slide on said guideways, rollers upon said platform movable out of and into engagement with the guideways and adapted to form bearings for the platform when in engagement with the guideways,bolts to which said rollers are pivoted and keys arranged to move and lock said bolts in two positions.

4. In a sidewalk-elevator the combination with a pair of parallel guideways, of a platform movable thereon and flanged guidepieces hinged to said platform and having parts normally extending beneath the guideways, said guide-pieces being laterally movable with respect to the guideways.

5. In a sidewalk-elevator the combination with a pair of parallel guideways, of a platform movable thereon, flanged guide-pieces hinged to said platform and having parts normally extending beneath guideways, said guide-pieces being movable laterally with respect to the guideways and latches for locking said guide-pieces in their normal positions.

6. In a sidewalk-elevator, the combination with a pair of parallel gnideways and a platform movable thereon, of aseries of frictionpulleys arranged at the upper end of said guideways, a series of friction-pulleys secured to the platform and a rope extending around both series of pulleys, said rope having one end attached to a fixed part of the elevator Vand its opposite end attached to the platform.

In testimony whereof I afix my signature in presence of two witnesses.

JACOB RIEG. Witnesses:

W. L. RAEDER, W. O. OLns. 

